Annunciator-drop.



C. AUTH.

ANNUNCIATOR DROP.

APPLICATION FILED DEc.29, 1908.

lll

omamis AUTH, or NEW l BROOKLYN, NEW Yon-x. .Y

ANNuNcrA'ronl-pnor.

intatti;

plicsation, Serial No. 442,396, filed July 7th, 190 l The object of my invention is to construct an annunciator drop of the above character which will be applicable with advantage to structures vwhich lare subjected to considerable movement or vibration, 'as ships, elevators, "movable partitions, etc. In such structures it is necessary to make use of' a drop which will be maintained permanently and positively in any position in which it is set, as 4the constant motion or vibration has a continual tendency to dislodge the indicator .which has been set in any one position. In indicators which depend merely upon gravity or some mechanical construction for maintaining the parts in their adjusted position, I find that there is a great tendency to rebound from the adjusted position into the original position from which the parts have beenvni'o'ved. i

In my jpresent inventiony I have accomplished the purpose above-referred to, and have at the same time avoided other disadvantages .which are present incertain instances in preceding constructions.

F orthe purpose of maintaining the dropl in any one adjusted position,-I makeuse of a permanent magnet, so that the armature to which the signalling, device of the drop isattached, is continually maintained in a magneti'zed field. This arrangement causes the armature to be attracted by the permanent-magnet to any one adjustedl position. when the circuit is broken, las Well as when the circuit is closed. I have further 'arranged this permanent magnet in such a Way that one end of itis attached to the ycores of the electro-magnets which I make use of for changing the armature from one position. to another. Because of this construction, when the circuit .is `broken the cores of the" electro-magnets form a horseshoe magnet with the permanent magnet,

Speci''utio of Letters iatent. i

applicati@ mea necen'iber as, iena. 'seran No. 469,900.

roman. Y., Assrenon roam/ra LoUSEaU'rH; oir l r as@ e,

so that in any one position ot' the armature one end 1s attracted by the permanent magnet and the other end is attracted by the V core of "one of the electro-magnets which it 'overlies and which has been magnetized by induction from thepermanent magnet. When the circuit is broken,` therefore, both ends of the armature are positively attracted. byu'sorne portion of the magnet so a'sVto maintain 'the sition.

yIn order to eiect the 'change of armature from one position to another, I make' use of two electro-magnets so Wound'l that the`clos` ing of the signaling circuit will cause one electro-magnet to' attract' one Q end of the armature andthe vother to repel the other endof the armature,v Whilev the closingof the re-setting circuit will efl'ect the reverse magnetization ofthe ltwo electro-magnets."

This produces a very powerful actuation of the armature with a given voltage,'actual practice having shown that the indicatorv can be moved with va. very much smaller voltage in this arrangement thanV in one Where dependence is merely had uponV a single attracting electro-magnet and the influence of. gravity. I make the permanent magnet of suiicient size to prevent any erroneous manipulations of the circuits from de-magnetizin'g it. I A further feature of my invention Consists in that all the parts. ofthe annunciator drop are attached to one another in a simple manner, so that the apparatus is entirely` self-contained and requires no adjustment other than its initial installation.

I have shown one form of my invention in the accompanying drawings, in which# Figure 1 is an elevation of the annun c'iator drop; Fig. 2 is a" plan' View thereof;

Fig. 3 lis a diagrammatic view showing the armature in one position; Fig. 4 is a view similar to Fig. 3,l showing the parts in the other position; Fig. 5 is a' view of a nonconductingplate situated on the front of the solenoids shown in section; Fig. 6 is a frontv elevation of the plate through which the signal appears; Fig. 7 is a diagrammatic View of the circuits employed.

.In the drawings, 1 and 2 are a pair of electroina'gnets which are attached to one anotherat their bases by means of' a softiron langle plate 3. Each electro-magnet is provided with an inner and ian outer Wind varmature in its ladjusted plo`y ing, the electro-magnet 1 having the inner' winding 3 and the outer winding 4f, und the electro-magnet 2 having the inner winding .Sand the outer winding The outer winding 6 and the inner winding 3 are located in a circuit which may be called the signaling circuit, which-isadapted when closed to operate the signal to attract the attention of the attendant. The inner winding 5 and the outer winding 4: are situated in a'nother circuit, which may be called the resetting circuit and which is adapted when closed to re-set the indicating device. In practice, these two circuits are arranged with one common conductor throughout a portion of the two circuits at 7. In operation, the outer windings 4 and 6 operate as the repelling windings, and the inner windings 3 and 5 as the attracting windings.

For reasons to be hereinafter described, I

make the attracting windings of a higher vresistance than the repelling windings, and

I also make the total resistance through 1the entire re-sctting circuit greater than the resistance in the signaling circuit.

Attached to one angle of the angle plate 3, there is a laminated permanent magnet 8,

which is screwed upon the angle plate 3 by means of a screw 9. The magnet 8 extends in` adirection parallel with4 the electro-magnets 1 and 2, and projects slightly beyond the coils thereof ending in a plane substantially that of the cores 9a of the'solenoids. Anonmagnetic plate y10 extends over the front surfaces ofthe electro-magnets. This plate 10 has two lateral guides 11 which maintain the front ends of the permanent magnet 8 in place. At one side of the electro-magnets the plate 10 is provided with two -reverseiy directed projections 12 which act as stops for the ends of an armature 13 which is pivoted upon a pintle 14 supported at one end in the plate 1() and at the other end in -an extension 15 ofthe said plate which is locatedparallel to the firstmention'ed portion of the plate. The extension 15 is provided with a plurality of holes, in this case substantially in the shape of the arms of a Maltese cross. In the rear of the "extensionv 15 there is supported, upon the pintle 14 in front of the armature 13, a disk 16 carrying'a. device of some description whichl may be made to show through the apertures 15a in theY extension.

In the operation 'of the device, it is assumed that the parts are re-set in such a position that the disk 16 does not disclose its distinguishing marks through the apertures l5L1 of the plate 15, and that the armature 13 is situated so that one end thereof4 overlies the electro-magnet 2, while the other end is attracted by the permanent magnet 8. If now the signaling clreult which includes the windings 3 and 6 is closed, the armature will be moved tothe maaar? other position in which one end -.hereo'i2 overlies the eleotronmgnet l, while the other end over'lies the permanent magnet t3. This willcause the distinguishing marks appearing upon the disk 1G to appear through the apertures 15 in the disk 15. In order to re-set the device, it is merely necessary to close the re-setting circuit including the windings 4 and 5 which will move the armature and the disk back to their original positions.

lVhile the circuit is broken and the parts are in the normal re-set position, inasmuch as the permanent magnet is connected by means of an iron plate with the cores of the solenoids,.the said cores and the permanent magnet will act as a horse-shoe magnet, so that each end of the soft iron armature is attracted thereby, one end being attracted by the permanent magnet and the other end by the core of the electro-magnet which it overlies. When now the signa. ing circuit is closed the inner winding of the electro-magnet is caused to attract one end of the armature 13,- and the outer Winding'of the electro-magnet 2 is caused to repel the other end of the armature. This results from the fact that when the circuit is so closed, the electro-magnet lproduces a minus magnetism at the front end of the core, whi1e`the electro-magnet 2 produces a plus magnetism at the front end of its core. Because of the presence of the strong permanent magnet 8,`

the armature is itself always magnetized by induction and the end of the armature which is turned away from the permanent magnet will have the same polarity. The front end of the permanent magnet being plus. the end of the armature turned away from it would be plus. The end turned away from the magnet 8 would, therefore, be repelled by electromagnet 2 when the signalingl circuit is closed as above. Upon the consequent shifting of the armature, the other pole would become plus and lwould be attracted by electromagnet 1, which is minus. This position is shown in Fig. fi. Such being the case, it will be seen that when the armature has assumed its positionas a result of the closing of the signaling circuit, both ends of the armature will be attracted by the portions of the actuating magnet which they overlie. It will be understood that the 4armature is attracted in this manner by the horse-shoe magnet formed by the permanent magnet and the cores of the electro-magnets.

malte the attractive windings longer than the repellent windings by giving them more turns, thus making t eattractivc magnetism lcore of'the attractive coil, due tothe fact that beforeoperation the armature overlies 'the repellentl coil. When so arranged, the magnetism in the attractive coil is substan- I tially equal to the reverse magnetism produced in the other electro-magnet bythe repellent coil thrown in circuit simultaneously therewith. As a result, the de-magnetization produced upon the permanent magnet, bei cause of the magnetization of the repellent' coil, is neutralized substantially by themagnetizing effect of the attractive coil upon the permanent magnet. I, however, make the total length of windings, that is to say the number of turns, of the re-setting coils greater than the total length of windings o r number of turns of the signaling coils, inasmuch as it is 'usual to place a number of drops in a single circuitfor re-setting purposes, whereas it is usual to place only a single drop in a signaling circuit. In the case where the re-setting and signaling currents are of equal voltage, the length of windings to which I have referred above will produce substantially the same effect upon any one annunciator drop, when the re-setting circuit is closed and when' the signaling circuit is closed.

At the same -time, although, the length of windings or number of turns in the attractive coil of the resetting circuit is greater than the length of windings or'number of turns of the repellent coil in the same circuit and the length of windings or number of turns of theattractive coil in the signaling circuit is greater' than the length of windings or number of turns of the repellent coil in the same circuit, and,although, the length of windings or number ofturnsl of the first mentioned attractive coil is greater than that lof the other attractive coilr and the length of windings or number of turns of that I am not necessarily limited thereby, but' consider that my invention is a broad one and capable or' many modifications and applications,

spirit thereof.

'I claim In a device of the characterl described,

the combination of an 'armature for' operating a signal, separate electro-.magnetic vdevices for operating upon different portions Without departing "from -vthe of the armature, each said device having' a plurality of windings repellent and attractive' lto the armature severally, and' means for establishing a circuit simultaneously through a repellent winding'of one electro# magnetic device and-an attractive'winding of the other.

- 2. In a device of the character.' described,

an electro-magnetic device for operating a signal, said device being provided with op# posite windings capable of reversing the polarity of the said device tooperate the signal in different directions and means for throwing into' a. circuit the windings run'- ning in one direction only at a given time.

3. In a device of the character described, an armature for operating a signal, separate electromagnetic devices for operating up'on different portions of. the' armature, each said electro-magnetic device having a" plurality of windingsv repellent and attractive t the armaturel severally, the re}' ellent windings havin'igfewer turns than the attractive windings, and means for establishing a circuit simultaneously through a repellent winding of one said device and an attractive Winding of the other.

4. In a device of the character'described, an armature, a repellent electro-magnetic device for operating upon one portion thereof, an attractive electro-magnetic device for operating upon another portion thereof, said deviceshaving cores, and another magnetic device for operating upon the armature connected to the cores of the electromagnetic devices, said repellent electromagnetic device having a smaller-magnetic force than the attractive electromagnetic device. j.

5. In a deviceof the .character described, an armature, a repellent electro-magnetic device for operating upon one portion thereof, an attractive electro-magnetic device for operating upon another portion thereof, said devices having cores, and a permanent mag `net for operating upon the armature con'- nected to the cores of the electro-magnetic devices, said repellent electro-magnetic device havinga smaller magnetic force than the attractive electro-magnetic device.

6.. In a device of the character described, a' signal, an electro-magnetic device for resetting the same', and another electro-magnetic device for throwing the signal into operation, the windings of the resetting electro-magnetic device having more turns than the windings ofv the other electro-magnetic device, only one of said electromagnetic devices being throwninto circuit at a given time.

7. In a device of the character described, the combination of an armature for opcrating a signalfanelectro-magnet forvoperating upon one portion of the armature, another electro-magnet for operating `upon another portion( of the armature, each -said electromagnet 'having opposite windings to repel or attract the armature, a repellent Winding of one electro-1nagnet and an attractive winding of the other electro-magnet being located in a circuit for resettingthe signal, and an attractive winding of the first g mentioned electro-magnet and a repellent Winding of the last mentioned electro-magnet, being located in another circuit for operating the signal, the lnumber of turns. of the windings in any one circuit being different and the dii'erence between the number of turns of the repellent and the attractive windings of one circuit being equal to that inthe other circuit.

8. In a device of the character described, the combination of an armature for operating a signal, an electro-magnet for operating upon one portion of the armature, another electro-magnet for operating upon another portion of the armature, each said electromagnet having opposite windings 'to yrepel or attract the armature, va repellent winding of one `electro-magnet and an attractive winding of the other electro-magnet being located in a circuit for resetting the signal, and an attractive winding of the first mentioned electrocnagnct anda repellent wiuding of the last mentioned electro-magnet bcing located in another circuit for operating the signal, the lengths of thel windings in any one circuit being dileifent, the dierence between the len ths of the repellent and the attractive win ings of one circuit being equal to that in the othercircuit, and the lengthof the windings of the resetting circuit being greater than the length of the windings of the circuit for operating the Signal; y i

9. In a device of the `character described the combination of a soft-iron armature -for operating a signal, a separate electro-inagnetic device Jfor operating each end of the armature, and means forpassin a current simultaneously through both e cetro-inagnetic devices to move the armature from one position. to another, to cause one electromagnetic device to repel the corresponding end of the armature and the other electromagnetic device to simultaneously attract the other end of the armature. v

In testimony that l claim the foregoing l have hereunto set my hand.

cuantas amsn. Viitnesses: Y* i 'EDWIN J. PRINDLE,

A.. NnwcoM. 

